Siphonproof ball cock



June 13, 1939. v H. D. cLEMMNs 2,162,573

SIPHONPROOF BALL COCK Filed Dec. 17, 1938 Patented June 13, 1939 i UNITED STATES PATENT OFFICE srrnosrngzrsm cock Herbert D. Clemmous, 'Sturgia'Ml/ch., assignor to Scovill Manufacturing Company.- Sturgis, Mich., a corporation. of Michigan Application December 17, 1938, Serial No. 246,297

8 Claims. (Cl. 137-69) This invention relates to improvements in In the embodiment 'of my invention illustrated, Siphon-proof ball cocks. I represents the supply pipe which is connected to The main objects of this invention are: a suitable source of water supply and which sup- First.' to provide a vacuum breaking Vball cock ply is tol be guarded or protected by preventing 5 or iiushing valve combination which is highly back siphoning. 2 is the discharge pipe deliverl efllcient and is not -likely to become'inoperative ing to the ilushing tank and 3 the overiiow pipe through clogging or getting `out of order. of the ilushing tank; The iiushing tank is not Second, to provide van anti-Siphoning device illustrated as its relation to the ushing .valve which may be readily embodied in well-known mechanism will be readily understood. A l types of ushing valveassemblies with little modi- Theinlet valve 4 is provided with a plunger 10 cation therein. or piston type of valve 5 controlled through the Third, to provide a device of the type descri d oat 6 to a suitable lever mechanism designated which is quite economical in the matter of p rts generally vby the numeral 1. and assembly. The valve casing 8 has an internally threaded l Objects relating to details and economies of the opening 9 at one side into which the nipple I0 of l invention will appear from the description to the discharge chamber II is threaded. The disiollow. charge pipe 2 is threaded into the bottom of this 'I'he invention is dened and pointed out in the discharge chamber. claims. The inlet valve delivery nozzle I2 is disposed A preferred embodiment of the invention is centrally and directed upwardly within the dis- 20 illustrated inv the accompanying drawing, in charge chamber II. A spider-like support I3 is which: 'V provided within the discharge chamber below the Fig. 1 is a fragmentary view partiaily in vertitip or discharge port of the'nozzle. cal section on line I-I of Fig. 3.0i. a flushing The discharge chamber is provided with a revalve assembly embodying my invention, certain movable cover I5 having av central opening I6 25 of the valve parts being shown by dotted lines. therein through which air may be admitted to Fig. 2 is a fragmentary view partially in secthe discharge chamber or, in other words, the

tion on line 2--2 of Fig. 3. opening I6 opens to the atmosphere' and both it Fig. 3 is a horizontal section on line 3--3 of and the discharge port of the valve are substan- Fig. 1 with the anti-Siphoning device proper retially above the top of the overiiow pipe. 30

moved from the valve body. A conical baille I'I is adapted when in a position The present invention relates to a vacuum of rest to rest upon the support I3 in embracing breaking d vice of simple construction which is relation to the nozzle but out of contact there adapted to l a hydraulic transmission line with so that air may pass through the opening when a fluid is ilowing therethrough, the force of I6 through the opening I8 inthe lower edge of 3 5 the iiuid itself being utilized to eiect this sealing, the baille and upwardly within the baille to the and to instantaneously open the line to atmosdelivery nozzle IZ'and thence into the valve caspheric pressure when the flow of fluid is disconing 8 to break any vacuum or suction ,that may tinued, whereby to break any condition of vacuum exist or be induced in the supply pipe I. 40 whichmay arise as for instance in the supply end 'When water is discharged from the nozzle, .it 40 thereof and thereby prevent back siphonage in impinges against the inner side of the baille memthe line. Such provision is especially useful in ber, lifting it to the position shown by dotted connection with the valve assembly oi' a iiushing lines in Fig. l, in which position the air opening tank, wherein the breaking'of any vacuum aris- I8 is closed and water is directed downwardly ing in the supply line prevents sucking of polaround the nozzle .and downwardly by the-baille 45 luted water up through the discharge pipe and through the openings in the spider-like support (into the system. My deviceA is particularly de- I3 and is discharged through the discharge ppe signed for such an application, however it should 2 into the tank. However, as stated, when water be understood that the principle and structure is not being discharged, the baille member dropsherein described and shown are of 'muchbroader to its normal or rest position so that a large 60 application than this and are. in fact, applicable capacity connection to the atmosphere is proto any casewhere it is desired tocommunicate a vided for breaking any vacuum or suction that hydraulic transmission line with the atmosphere may occur in the supply pipe. ff upon cessation of now of fluid therein to break The cover or plate Iii is detachably connected |l vacuumin the line. by means oi screws I9 to facilitate assembling. l

It will be noted that the lcentral portion of the spider-like support i3 is disk-like and imper-" in the 'supply system, and in the event thig occurs I before the water in the discharge pipe has I reached its normal level or in the event that it I'Iii is quite high in the discharge, there may be som'e resurging action set up and this guard prevents any water due to this resurgence entering the nozzle. under any normal .conditions but the guard is desirable and effective under extreme conditions.

The refill tube 20 is connected to the discharge chamber and in practice is operatively associated with the 'overflow pipe. However, as such an arrangement is well understood, I have not illustrated this association in the accompanying drawing.- t

While I would contemplate embodying my invention vas a complete valve assembly, one of the advantages of the vacuum breaker device proper is that it-cai be readily applied to various types of iiush valves now on the market, the discharge pipe connections commonly employed being removed and my vacuum breaker assembly being substituted. In my device, the line is open to the atmosphere at all times when the baille member is not subjected to a positive pressure in the supply line. Owing to the unique construction of the parts .in the embodiment of my invention illustrated, the baille member may be pushed dovvnV conical baille member is directed downwardly to the dischargepipe 2.

I have illustrated and described my improvements in an embodiment which I consider very practical.- I have not attempted to illustrate or describe certain embodiments and adaptations which I contemplate as it is believed that this disclosure will enable those skilled in the art to embody or adapt my improvements as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A vacuum breaker comprising a delivery chamber communicating through an aperture with the atmosphere, said aperture having an outwardly tapered edge, a liquid discharge orifice in said chamber directed toward said aperture, a conical baille member movably supported in 'said chamber in line with the discharge of the orifice and operative when actuated by the discharge from the orifice to enter said apertureand sealingly engage said tapered edge, means for supporting said baille member in spaced relation to said aperture and orifice to permit passage of air through the, aperture when liquid is not being discharged from said orifice and around said baille member to said oriiicewhereby `to break a vacuum in the supply line for the orifice, and discharge means for said chamber, said baille member when in actuated position deecting the fluid discharged from the orifice toward said discharge means.

2. A vacuum breaker comprising a delivery chamber communicating through an aperture with the atmosphere, said aperture having an Such situation is not likely to occur outwardly tapered edge, a liquid discharge oriiice in said chamber directed toward said aperture, a conical baille member movably supported in said chamber in line with the discharge of the orifice and operative when actuated by the discharge from the'orice to enter said aperture and sealingly engage said tapered edge, and means for supporting said baille member in spaced relation to said aperture to permit passage of air therethrough when liquid is not being discharged from said orifice and around said baille member to said orice whereby to break a vacuum in the supply line for the orice.

3. Av vacuum breaker comprising a hollow body communicating through an aperture with the atmosphere, an upwardly directed liquid discharge oriilce within the body, and a conical baille member movably supported in the body adjacent to and in position to receive the impact of the discharge from' said orifice whereby itis actuated to'enter said aperture in said hollow body and close said aperture, said baie member being normally supported in spaced relation to said aperture, permitting when in normal position the passage of air therethrough to said orifice.

4. A vacuum breaker comprising a discharge chamber having a downwardly directed discharge pipe and'an opening to the atmosphere above said discharge pipe, a liquid discharge orice in said chamber, and a conical baflie member movably supported in said chamber in th'e line of discharge from said orice and actuated by the discharge from the orifice to enter said aperture and close said aperture, said baille member being supported in normally spaced relation to said aperture to, permit ythe passage of air therethrough and around the baille member to said orice ,nozzle disposed centrally within said chamber, a

guard member surrounding said delivery nozzle and disposed centrally within said chamber, and a conical baille member disposed in said chamber above said guard memberl and adapted to normally rest thereon, said baille member when resting upon said guard member beingin spaced relation to the tip of the nozzle to permit the passage of air around the baille member to said nozzle, the guard member acting to'guard said nozzle from an upward surge within said chamber.

6. A vacuum breaker comprising a discharge chamber having a downwardly directed-discharge pipe and an opening to the atmosphere above said,

discharge pipe, an upwardly directed-liquid delivery port disposed centrally within said chamber, a guard member disposed below said delivery port and centrally within said chamber, and a conical baille member disposed in said chamber above said guard member to receive the impact of the liquid discharged from said nozzle, said guard member acting to guard said nozzle from an upward surge within said chamber.

7. A vacuum breaker comprising a delivery chamber -having a centrally disposed air opening at the top thereof and a downwardly directed discharge pipe positioned centrally thereof, an upwardly directed delivery nozzle disposed centrally in said chamber, a conical baille floatingly-supported above-said nozzle to receive the impact of y the water from the nozzle centrally thereof, and

a guard member for said nozzle disposed below thel tip thereof and centrally of said chamber.

8. A vacuum breaker 'comprising a delivery chamber having an air opening at the top and a downwardly directed discharge pipe, a liquid inlet having an upwardly directed liquid delivery port, a baille supported above said port in position said chamber from said port.

HERBERT D. CLEMMONS. 

